An old stock market quote from the archives,
"Historically, you buy stocks when they're yielding 6 percent and selling at eight times earnings. You sell them when they're at 22 times earnings and yielding 2 percent."
-Jim Rogers
Related trading instruments: SPDR S&P 500 ETF Trust (SPY), Russell 2000 Index ETF (IWM), SPDR Dow Jones Industrial Average ETF (DIA), iShares MSCI Emerging Markets Index ETF (EEM)